428 LAND AND FRESHWATER 



ALTC-3ET73 RicHTHOFENi, W. Blant'oi'd. Tvpe Blf. Coll. No. 24.06,5.5. 

 B.M. (Plate CLI. fig. 9.) 



W. T. Blanford, J. A. S. B. 1SG3, pt. 2, p. 324; llanley & 

 Theobald, Conch. Ind. 1870, p. 39, pi. xciv. figs. 5, 6 ; Theobald, 

 Cat. Supp. 1876, p. 40 ; G. Nevill, Hand-list, i. J 878, p. 293: two, 

 south of Moulmein. 



Original descrijition: — "Shell umbilicated, turbinate, rather solid, 

 closely tlexuously co^tulated, more strongly on the intlated portion. 

 ISpire conical; apex rather acute; suture impressed. V^borls 5, 

 rounded, the last moderately swollen at the side and subangulate 

 at the periphery and more strongly so round the umbilicus, then 

 much contracted, ascending slightly at the inflection, descending 

 considerably behind the aperture. Constriction slightly costulated, 

 crossed by a very prominent vertical ridge. ISutural tube of 

 moderate length, about 2| mm. Aperture circular, very oblique. 

 Peristome continuous, double; the inner lip projecting slightly, 

 and waved 3 times on the dextral side. Outer lip broadly and 

 flatly expanded. Operc. ? 



" I am indebted to Baron F. v, Bichthofen for the only specimen 

 of this shell which has been found. It is perfect, but bleaclied. 

 The species is quite distinct in type from any Indian or Burmese 

 form with which I am acquainted ; it combines a high conical spire 

 with a strong ridge on the constriction, but it recalls somewhat the 

 Javanese A. jac/ori, Martens. 1 have much pleasure m naming 

 this interesting little form alter the discoverer, to whom I was also 

 indebted for some living specimens of liaphaulus chri/salis, Pfr., 

 and other Moulmein shells.'"' 



The example I have figured is one in Blanford's collection. 

 I have every reason to consider it the type described by him, 

 although not marked so. The subangulation at the periphery is 

 not very apparent ; turning the shell about in different lights, it is 

 now and then caught — it is quite apparent round the umbilicus. 



AxTc^rs (DiORYx) cochine>'sis, n. sp. (Plate CLYI. figs. 7, 7 a.) 



Locality. Cochin China, ex coll. Museum Cuming. Natural 

 History Museum. 



Shell rimate, globosely conical; sculpture so fine as to be almost 

 smooth, next suture more defined regular liration is to be seen ; 

 colour white, specimen rather bleached ; sutural tube short ; spire 

 fairly high, apex small ; suture impressed ; whorls 4, the last very 

 globose as seen from the outer side ; the constriction narrower 

 than in any other species I have drawn, tlie sutural tube rising 

 just behind and quite close to the peristome; aperture vertical, 

 circular ; peristome double, not much thickened. 



Size : major diam. 5'5 ; alt. axis 4"75 mm. 



This shell was stuck on tlie same slab with Ahjco'iis r/ibhus, 

 taken, I presume, as the young shell of that species, but the form 

 of the apex and very smooth surface showed it to be something 

 else — this Mr. II. C. Dobsou had noticed in the remarks on invoice 



